Drill head



FIG. 1 is a perspective view of a drill head showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed lines found in FIGS. 1 and 4-7 show optional features of the design and form no part of the claim. 

CLAIM The ornamental design for a drill head, as shown and described. 